Sanding tool



y 15, 1951 w. B. HAYS 2,553,254

SANDING TOOL Filed Sept. 2, 1948 WILL/AM B. HAYS M ATTOR/YE Y Patented May 15, 1951 UNITED STATES PATENT OFFICE SANDING TOOL William B. Hays, Davenport, Iowa Application September 2, 1948, Serial No. 47,354

12 Claims. 1

My present invention relates to a sanding tool of the type in which a strip of emery paper, sandpaper, and other suitable sanding material is stretched around a foundation block of fixed dimensions, designed to be used as a hand tool in sanding operations. Among the objects of this invention are the provision of a sanding tool of the type referred to, such that substantially the entire length of the sanding material may be effectively used; the provision of a sanding block in which the fastening of the sanding strip in place will operate to cause tightening of the sanding material around the foundation block; the provision of a sanding block which will be inexpensive to manufacture and which can be sold at a price that anyone wishing to make use of sanding blocks can afford to have any desired number of these blocks; the provision of asanding block which is so constructed that a new strip of sanding material may be substituted for the one previously used, either because worn out or for the purpose of changing the grade of fineness; and such further objects, advantages, and capabilities as will hereafter appear and as are inherent in the construction disclosed herein. My invention further resides in the combination, construction, and arrangement of parts illustrated in the accompanying drawings and, while I have shown therein what is now regarded as the preferred embodiment of this invention, and a modification thereof, I desire the same to be understood as illustrative only and not to be interpreted in a limiting sense.

In the drawings annexed hereto and forming a part hereof,

Fig. 1 is a perspective view of one form of this invention, ready for use;

Fig. 2 represents a partial side view of th structure shown in Fig. 1 with the sanding strip being put into place on the foundation block;

Fig. 3 is a perspective view of another form of this invention, ready for use;

Fig. 4 represents a partial side view of the central part of this block with the sanding material being put in place; and Fig. 5 represents a similar view with the latching lever turned down into latching position.

' Reference will now be made in greater detail to the annexed drawings for a more complete description of this invention. The foundation block I has opposite sides and ends parallel, the ends 2 being cut on planes diagonal to the longitudinal faces which serve as supports for the sanding strip 3. In the form of my invention which is shown in Figs. 1 and 2, a slot or groove 4 with parallel walls is formed in one face of the block I for the reception of the ends of the strip 3 and, the central crossbar section of the holding member or wire 5, the ends of which are bent at a. right angle to the body of the wire and inserted into holes 6 formed in the opposite edges of the block. As indicated at 1, there is a slight bend formed in the arms of the wire 5. The crossbar of this holding member or wire fits into the slot 4 closely enough that the slight bends at 1 are partly but temporarily removed when the crossbar is forced into the slot 4. Therefore, there is a sufiicient tension to hold this, wire 5 in place, notwithstanding some tension. which may be placed on the sanding strip during, the sanding operation.

Because of the shape of the ends of the block I and the fact that the sanding material is drawn tightly around the block, all but short pieces. at the ends of the sanding material may be utilized in the sanding work. When it is desired to replace the sanding strip by a fresh strip, it is necessary only to remove the springy wire from the slot 4, when it will be possible to remove the sanding material from this slot and from the block. A new strip can then be put around the block, as shown in Fig. 2, and the wire loop 5 forced into place in the slot 4. If the sanding strip happens to be a little too long, so that the outside end of strip 3 projects beyond the general surface of the sanding material, any surplus can be cut off so that the end of the strip will be substantially flush with the surface which is to be used in sanding.

The form, of construction shown in Figs. 3, 4, and 5 differs from that shown in Figs. 1 and 2 in the manner of fastening the ends of the sandin material to the block. A hole 8 is formed through the block, parallel to the adjacent face, the same being spaced somewhat from the face of the block. A slot is cut from the face of the block into this opening 8, and then the edges are rounded somewhat, as shown at 9 and ID. This is in order to prevent cutting of the base mem ber of the sanding strip where it passes over the edges 9 and ID. A nearly complete cylindrical member or sleeve II is inserted into the opening 8', transversely of the block I, this member being formed with a slot in one side thereof for insertion of the oval-shaped bar [2, to the ends of which are secured the handles l3 and [4. A small hole l'5 may be formed in the block, as shown in Fig. 4, for the reception of a pin l6 which will prevent the handles l3 and [4 from turning, and thus permitting the bar I2 tov turn.

In assembling the parts shown in Fig. 3, the bar i2 is first inserted through the slots in the block I and the sleeve ll until it occupies a space within the sleeve, and the handles l3 and I4 occupy a vertical position. The strip 3 is then placed around the block with the ends forced into the space within the sleeve ll, between it and the bar I 2. Then, with the ends of the strip in position, as shown in Fig. 4, one or both of the handles'are pressed down beside the blockyas shown in Fig. 5, and the pin [6 in put in place to hold the parts, as shown in Fig. 3.

As the parts start from the position shown in Fig. 4, the crossbar I2 grips the fabric between itself and the sleeve ll so that the fabric cannot slip. This is because the greatest diameter of the bar !2 is slightly greater than the diameter of the hole in the sleeve 1 I. is put on the handles to turn them downwardly, the bar i 2 causes the sleeve II to turn in the hole 8, the ends of the sanding strip 3 being held tightly between the bar and the sleeve, as shown in Fig. 5. This prevents any slipping of the ends of the sanding strip and holds the strip drawn tightly about the block and into the opening 8. Of course, if the sanding strip has been out too long, it will not be drawn tightly about the block. Therefore, it seems best that these strips be cut of a standard length to fit a block of a standard length so that there will be no ing a strip to a block.

In this specification and the appended claims,

the word sanding is used in the generic sense of abrading, and sanding material refers to any suitable flexible abradent strip which may be wrapped around the foundation block.

It is of course understood that the specific description of structure set forth above may be departed from without departing from the spirit of this invention as described herein and as defined in the appended caims.

Having now described my invention, I claim:

1. A sanding block for manual use compris ing, in combination, a foundation block in the form of a parallelepiped-on, one of the large faces of the block having a slot cut therein, transversely to the length thereof and opening into a cylindrical channel para lel to said slot, an incompletely cylindrical, tubular member in said cylindrical channel, a generally oval bar extending through the tubular member and having-on at least one end a transverse handle whereby the bar may be turned in the tubular member, and a strip of sanding material wrapped around said block with its ends held tightly in the tubu lar member by the bar.

2. A sanding device adapted to receive an elongated abradent strip and comprising an elongated foundation block with flat faces having 'a transverse opening adjacent an outer face of the block and a slot leading from said face to said opening, a two-part gripping device in said opening and including a first part rotatable in said opening and a second part having limited movement relative to said first part and adapted to grip the ends of said strip when said second part is rotated toward said first part with the strip ends situated therebetween, further rotation of said second part serving to tighten the strip about said block, and means acting between said second part and said block for holding said gripping device in strip-tightening position.

' 3. A sanding device adapted to receive an elongated abradent strip and comprising a foundation block of elongated configuration having a mishap in apply .4 transverse opening adjacent an outer face of the block and a slot leading from said opening outwardly to said block face, a rotatable sleeve-like member in said transverse opening and having a slot adapted to receive the ends of said strip after it has been placed around said foundation block and the ends brought through said slot in the block and into the slot in said sleeve-like member, said sleeve-like member being of a size to fit closely'in-said opening in the'block and a locking member movably carried by said sleeve-like member and shaped to clamp the ends of said strip against said sleeve-like member when turned relative to the latter and to turn said sleeve-like member in said block when turned farther than its strip-clamping position.

Then, as more pressure :4. In a sanding device, a gripping device for clamping the ends of an abradent strip or the like, comprising a support member parallelepipedon form having a transverse opening of substantially cylindrical form and a slot leading from said opening to an exterior face of said member, a first gripping member rotatable in said opening, fitting therein, and having a slotted portion adapted to receive an end of said strip, and a second gripping member rotatable within said first gripping member and adapted, when turned reiative tothe latter, to grip the ends of said strip thereagainst and,.when turned farther-relative to said support member, to turn said first gripping member and, at least partially, to wind said strip thereon.

5. In a sanding device, a gripping device for clamping the end of an abradent strip or the like, comprising a support member of parallelepipedon fcrmhaving a transverse opening of cylindrical form and a sot leading therefrom to an exterior face of said member, a first gripping member rotatable in said opening and comprising a cylindrical tubular sleeve having an axially extending slot adapted to receive an end of said strip,'and a second gripping member rotatable within said sleeve and comprising a bar lying within said sleeve and shaped to receive said strip end when thelatteris inserted through said slot in the sleeve and, when turned relative to said sleeve, to clamp said end of the strip against an edge of said slot in the sleeve, further rotation of said second gripping member serving to turn said first gripping member in said support member and wind the end of said strip thereon, and means for turning said bar, said cylindrical tubular sleeve being adapted to clamp the strip between itself and the'block.

6. For use in a sanding device having an elongated foundation block adapted to receive an abradent strip or the like and provided with a transverse cylindrical opening and having a slot leading therefrom to a face of said block, whereby the ends of said strip may be placed in said opening: the improvement comprising a twopart strip-gripping device adapted to be positioned in said opening and including a first part of cylindrical form rotatable in said opening and a second part having limited rotary movement relative to said first part and having a section adapted to grip the end of said strip when said second part is rotated toward said first part with the ends of the strip positioned between said sec- Id ing eccentrically positioned and turning the first part into strip-engaging position when turned.

7. A device as set forth in claim 6 including holding means comprising an arm fixed to said second part, adjacent one end, and a pin in-- sertable in a hole in said block engageable with said arm for holding said second part in looking position.

8. In a sanding device having a foundation block provided with a slot cut in one of the faces of said block and opening into a cylindrical channel parallel to said slot; the improvement comprising strip-gripping means adapted to grip the ends of an abradent strip encircling said block and including an incompletely cylindrical, tubular member adapted to be positioned in said cylindrical channel, and a substantially oval bar adapted to extend through said tubular member and having on at least one end a transverse handle by which the bar may be turned in the tubular member, said bar being shaped to grip the ends of said strip in said tubular member and to turn the latter to tighten said strip.

9. A device as set forth in claim 8 in which the incompletely cylindrical structure of said tubular member forms a relatively wide slot, said oval bar being insertable through said latter slot into position in said tubular member.

10. A device as set forth in claim 8 including locking means adapted to be carried by said block and acting against said handle for holding the bar in strip-tightening position. I

11. A device as set forth in claim 8 in which said block has a hole adjacent said channel, and a pin insertable in said hole and adapted to engage said handle for locking the bar in its striptightening position.

12. A sanding device comprising a block adapted to receive a strip of abradent material, said block having a slot formed in one face thereof and opening into a cylindrical channel parallel to the slot, an incompletely cylindrical tubular member in said cylindrical channel and rotatable therein, a substantially oval bar eX- tending through the tubular member and turnable therein, said bar being positioned eccentrically with relation to said tubular member, said bar being shaped to grip the ends of the strip against a portion of the tubular member, and a handle fixed to one end of said bar for turning the latter to grip the ends of said strip and to turn said tubular member relative to said block to tighten said strip.

WILLIAM B. HAYS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,374,052 Brauner et al. Apr. 5, 1921 1,455,559 Wright et a1 May 15, 1923 1,631,798 Davol June 7, 1927 1,656,981 Lewis Jan. 2 1, 1928 2,401,116 Stang May 28, 19 16 2,411,615 Dodelin Nov. 26, 1946 FOREIGN PATENTS Number Country Date 13,841 Great Britain July 5, 1905 200,783 Great Britain July 12, 1923 

